Combined filter and pneumatic pressure tank



Oct. 20, 1942. J. STRONG COMBINED FILTER AND PNEUMATIC PRESSURE TANK Filed Sept. 5, 1959 Patented Oct. 20, 1942 COMBINED FILTER AND PNEUMATIC PRES- SURE TANK John Strong, Downers Grove, Ill. Application September 5, 1939, Seri'alNo. 293,370

1 Claim.

supplied from the tank.

The principal objects of provide a simple, convenient and eflicient filter accompanying drawing in which,

Fig. 1 is a Vertical sectional view through a combined pressure tank and filter constructed in accordance with my invention;

Fig. 2 is a transverse sectional View thereof taken on the line 22 of Fig. 1 with a portion broken away; and

Fig. 3 is a sectional view at tank taken on the line 33 of the bottom of the Fig. 1.

part of the present invention.

Oftentimes it is desirable to filter the water also shown as closed by the plug (Cl. 210F136).

wall 1 so as to leave a, narrow passageway M between the lower edge of the partition 9 and the bottom wall I permitting communication from the the compartment II, the latand l2 respectively.

One or more water inlets l5vare provided leading into the main chamber of the tank 5 preferhas one l8 at the top, one of which is 19 and the other of which has a discharge pipe 20 leading therefrom to the system to which water is supplied from the pressure tank 5. Filtering material or in the compartment water supply, while the compartment or more outlets which has a screw 28 threaded therethrough and operable by the hand wheel 29 to engage centrally against the cover 22 as shown. For clean out purposes the compartment I I may also have an opening 30 at the bottom closed by a removable threaded plug 3|.

Any desired filtering materials may be employed in the compartment ll,

layer 33 to These filtering materials may be readily applied through the opening 2! which also, together with the plugged opening 30 permits cleaning out of the filter compartment II when required.

I also find that it is advantageous to provide a small amount of fairly coarse gravel of about quarter inch size in the bottom of the compartment ID as indicated at 31, which said gravel may be introduced through one of the inlet holes l5 of the tank before it installed.

Thus with the above construction the water supply from the pressure tank necessarily is required to pass upwardly through the filtering materials in II to reach the outlet or outlets l8 from the pressure tank and accordingly all of the water supplied therefrom is eflectively filtered. Moreover, it will ing device is provided without substantial change in the ordinary pressure 9, l2 may be readily installed in the course of construction of the tank, that the addition of the filtering facilities involves only a slight increase in the cost of the tank and involves no extra installation charges and'that the tank may be used as an ordinary pressure tank (without filtering materials) if desired. the addition of the filtering facilities does not appreciably affect the capacity of the pressure require a larger size tank than would otherwise be used, and it will noted that the filtering materials are safeguarded against disturbance in use as they are continually submerged in water and no air can reach the filter compartment less the tank is emptied to the extent that the level of the water in the part In of the main chamber of the tank is below the slit l4 through which water enters the filter compartment ll.

While I have shown and described my inven- II to agitate the contents thereof untank, that the partition tion in a preferred form, I am aware that various changes and modifications may be made therein without departing from the principles of my invention, the scope of which is to be determined by the appended claim.

I claim as my invention:

A pressure tank having a water inlet considerably below the normal water level of the tank when in use, and when in use having a large volume of air above serve as a pneumatic cushion, the bottom portion of the tank shut of)? communication between the main portion of the tank and a secondary portion thereof, thereby forming an auxiliary compartment, the upper portion of said wall being cut to fit edgewise against the inner wall, and the lateral edges of the lower portion of the first mentioned wall fitting against the vertical inner surface of the tank, said edges being secured in water-tight relation to the tank wall, the bottom edge of the first mentioned wall being spaced from the bottom of the tank to permit flow of water between the bottom of the tank and the bottom edge of said first mentioned wall but being close enough to the tank bottom to prevent movement of sizable materials from one portion of the tank to the other portion thereof, inlet and outlet pipes connected to the tank the inlet being at substantially the height of the upper end water will be admitted to the tank below the normal water level and above sediment in the tank, the tank having coarse filtering material in the bottom of both compartments and finer filtering compartment and the outlet comm icating with the" auxiliary compartment adjacent the top thereof.

the water to be compressed and a wall within to substantially JOHN STRONG. 

